Patents by Inventor Lawrence S. Apfelbaum

Lawrence S. Apfelbaum has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Diagnosis of faults on circuit board
    Patent number: 4857833
    Abstract: A method of determining which of a plurality of electrical devices connected to a node of a circuit under test is causing a failure at that node by causing individual devices to drive the node one device at a time, taking passive voltage measurements at the node at separate times when individual devices are controlled to drive the node, and analyzing measured voltages resulting when different devices are driving the node to identify which is causing the failure.
    Type: Grant
    Filed: August 27, 1987
    Date of Patent: August 15, 1989
    Assignee: Teradyne, Inc.
    Inventors: Roberto Gonzalez, Lawrence S. Apfelbaum